The DOI matches its Crossref record; 36 of the 36 references it cites were found in a registry or an index.
Indirect-to-Direct Band Gap Crossover in Few-Layer MoTe2
Open accessAbstract
We study the evolution of the band gap structure in few-layer MoTe2 crystals, by means of low-temperature microreflectance (MR) and temperature-dependent photoluminescence (PL) measurements. The analysis of the measurements indicate that in complete analogy with other semiconducting transition metal dichalchogenides (TMDs) the dominant PL emission peaks originate from direct transitions associated with recombination of excitons and trions. When we follow the evolution of the PL intensity as a function of layer thickness, however, we observe that MoTe2 behaves differently from other semiconducting TMDs investigated earlier. Specifically, the exciton PL yield (integrated PL intensity) is identical for mono and bilayer, decreases slightly for trilayer, and it is significantly lower in the tetralayer. The analysis of this behavior and of all our experimental observations is fully consistent with mono and bilayer MoTe2 being direct band gap semiconductors with tetralayer MoTe2 being an indirect gap semiconductor and with trilayers having nearly identical direct and indirect gaps. This conclusion is different from the one reached for other recently investigated semiconducting transition metal dichalcogenides for which monolayers are found to be direct band gap semiconductors, and thicker layers have indirect band gaps that are significantly smaller (by hundreds of meV) than the direct gap. We discuss the relevance of our findings for experiments of fundamental interest and possible future device applications.
Overview
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Citations
Cites
Electronics and optoelectronics of two-dimensional transition metal dichalcogenides
Wang, Q. H., Kalantar-Zadeh, K., Kis, A., Coleman, J. N., & Strano, M. S. (2012) · Nature Nanotechnology · doi:10.1038/nnano.2012.193 · Cited by 16,374
Atomically Thin MoS 2 : A New Direct-Gap Semiconductor
Mak, K. F., Lee, C., Hone, J., Shan, J., & Heinz, T. F. (2010) · Physical Review Letters · doi:10.1103/physrevlett.105.136805 · Cited by 15,586
The chemistry of two-dimensional layered transition metal dichalcogenide nanosheets
Chhowalla, M., Shin, H. S., Eda, G., Li, L.-J., Loh, K. P., & Zhang, H. (2013) · Nature Chemistry · doi:10.1038/nchem.1589 · Cited by 10,034
Emerging Photoluminescence in Monolayer MoS2
Splendiani, A., Sun, L., Zhang, Y., Li, T., Kim, J., Chim, C.-Y., Galli, G., & Wang, F. (2010) · Nano Letters · doi:10.1021/nl903868w · Cited by 9,501
Coupled Spin and Valley Physics in Monolayers ofMoS2and Other Group-VI Dichalcogenides
Xiao, D., Liu, G.-B., Feng, W., Xu, X., & Yao, W. (2012) · Physical Review Letters · doi:10.1103/physrevlett.108.196802 · Cited by 5,152
Control of valley polarization in monolayer MoS2 by optical helicity
Mak, K. F., He, K., Shan, J., & Heinz, T. F. (2012) · Nature Nanotechnology · doi:10.1038/nnano.2012.96 · Cited by 4,034
Valley polarization in MoS2 monolayers by optical pumping
Zeng, H., Dai, J., Yao, W., Xiao, D., & Cui, X. (2012) · Nature Nanotechnology · doi:10.1038/nnano.2012.95 · Cited by 3,693
Tightly bound trions in monolayer MoS2
Mak, K. F., He, K., Lee, C., Lee, G. H., Hone, J., Heinz, T. F., & Shan, J. (2013) · Nature Materials · doi:10.1038/nmat3505 · Cited by 2,865
Emerging Device Applications for Semiconducting Two-Dimensional Transition Metal Dichalcogenides
Jariwala, D., Sangwan, V. K., Lauhon, L. J., Marks, T. J., & Hersam, M. C. (2014) · ACS Nano · doi:10.1021/nn500064s · Cited by 2,753
Valley-selective circular dichroism of monolayer molybdenum disulphide
Cao, T., Wang, G., Han, W., Ye, H., Zhu, C., Shi, J., Niu, Q., Tan, P., Wang, E., Liu, B., et al. (2012) · Nature Communications · doi:10.1038/ncomms1882 · Cited by 2,605
Cited by
Schmidt, H., Giustiniano, F., & Eda, G. (2015) · Chemical Society Reviews · doi:10.1039/c5cs00275c · Cited by 466
Halide-assisted atmospheric pressure growth of large WSe2 and WS2 monolayer crystals
Li, S., Wang, S., Tang, D.-M., Zhao, W., Xu, H., Chu, L., Bando, Y., Golberg, D., & Eda, G. (2015) · Applied Materials Today · doi:10.1016/j.apmt.2015.09.001 · Cited by 465
Two-dimensional halide perovskite nanomaterials and heterostructures
Shi, E., Gao, Y., Finkenauer, B. P., Akriti, A., Coffey, A. H., & Dou, L. (2018) · Chemical Society Reviews · doi:10.1039/c7cs00886d · Cited by 445
Li, Y., Duerloo, K.-A. N., Wauson, K., & Reed, E. J. (2016) · Nature Communications · doi:10.1038/ncomms10671 · Cited by 422
Samadi, M., Sarikhani, N., Zirak, M., Zhang, H., Zhang, H.-L., & Moshfegh, A. Z. (2018) · Nanoscale Horizons · doi:10.1039/c7nh00137a · Cited by 408
Metadata
- Authors
- Lezama, I. G., Arora, A., Ubaldini, A., Barreteau, C., Giannini, E., Potemski, M., & Morpurgo, A. F.
- Venue
- Nano Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2015-03-27
- Volume
- 15
- Issue
- 4
- Pages
- 2336-2342
- ISSN
- 1530-6984 (ISSN-L)
- 1530-6992
- OpenAlex
- W2063576642
- Cited by
- 454
- References
- 36
- FWCI
- 18.92
- Type
- journal article
- Language
- en
- Open access
- green
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review
How to cite
Cite CoChat for the checks on this page, and the paper for its own findings.
- This page
- CoChat. (2026). Citation check: Indirect-to-Direct Band Gap Crossover in Few-Layer MoTe2. https://app.cochat.ai/papers/10.1021/nl5045007
- The paper
- Lezama, I. G., Arora, A., Ubaldini, A., Barreteau, C., Giannini, E., Potemski, M., & Morpurgo, A. F. (2015). Indirect-to-Direct Band Gap Crossover in Few-Layer MoTe2. Nano Letters. https://doi.org/10.1021/nl5045007
Data sources
Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
